>4r18D (D:) observed residues (from ATOM records)
drgvstfspegrlfqveysleaiklgstaigiatkegvvlgvekratspllesdsiekiv
eidrhigcamsgltadarsmiehartaavthnlyydedinvesltqsvcdlalrfgelms
rpfgvalliaghdaddgyqlfhaepsgtfyrynakaigsgsegaqaellnewhssltlke
aellvlkilkqvmeekldennaqlscitkqdgfkiydnektaelikelkekeaae